Quickbooks Error H202
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Quickbooks Error H202 occurs when a Workstation fails to communicate with the Company file and is not able to access the Company file.
Config QuickBooks Database Server Manager is a method to solve QuickBooks Error H202.
From your keyboard, press Windows+R and type msc, then click on Services.
Select QuickBooksDBxx (where XX denotes the version of your QuickBooks).
Click the Stop button to stop the QuickBooksDBxx service after double-clicking it.
In the drop-down menu, choose Automatic as the service start option, and follow that with Start
Try opening QuickBooks again.